feat: add linuxX64 KMP target and restructure native source sets
Restructure quartz module's Kotlin/Native source set hierarchy for
proper multiplatform coverage. Adds linuxX64 target with complete
actual implementations for all expect declarations.
Source set hierarchy:
commonMain
├── jvmAndroid → jvmMain, androidMain
└── nativeMain (shared pure Kotlin)
├── appleMain (Apple APIs) → iosMain
└── linuxMain (POSIX/OpenSSL) → linuxX64Main
nativeMain: Address, OptimizedJsonMapper, EventHasherSerializer,
ChessEngine, Secp256k1Instance, BitSet, StringExt, io/ utilities
appleMain: Log (NSLog), SecureRandom (SecRandomCopyBytes),
UriParser (NSURLComponents), BigDecimal (NSDecimalNumber),
GZip (zlib), Sha256 (CC_SHA256), crypto (Apple provider),
LargeCache (CacheMap), UrlEncoder, UnicodeNormalizer
linuxMain: Log (println), SecureRandom (/dev/urandom),
UriParser (pure Kotlin), BigDecimal (pure Kotlin),
GZip (zlib cinterop), Sha256 (OpenSSL), crypto (OpenSSL),
LargeCache (AtomicReference<LinkedHashMap>), UrlEncoder
macOS targets deferred pending negentropy-kmp macOS artifacts.
macosMain/Platform.kt retained as scaffold for future activation.
https://claude.ai/code/session_01M9CAuPUV3TfPB2xShnsBhw
Claude
5fc7526076